Xwilliam m morrison



(No Model.) 2 sheets-sheet 1.

W. MORRISON.

BRUSH v No. 539,903. Patented May 28, 1895.

@vena/'x (No Model.) 2 Sheets--Sheet 2.

W. MORRISON. Y-

BRUSH.

PatnlizedV May 28,1895.-

No. 539,903.A

Fries.

IVILLIAM MORRISON,

OF LANSINGRURG, NEW YORK, AssIGNoR To EMMA MORRISON, OF SAME PLACE.

JBRUSH.

SPECIFICATION forming part of Letters Patent No. 539,903, dated May 28,1895. Application filed January I 1895. Serial No. 533,947. (No model.)

i To all wwwb it may concern:

' tion.

( Similar letters refer to similar parts in the several figures therein.

Figure l of the drawings is a face view of a finished brush. Fig. 2 is avertical longitudinal section of the same, takenon the broken line 2 2in Fig. l, the relative position of the die-mold sections beingindicated by dotted lines. Fig. 3 is a face view of a recessedback-blankrmade of wood, without the bristlesupporting block. Fig. 4 isa longitudinal vertical section of the same, taken on the broken line 44 in Fig. 3. Fig. 5 is a vertical cross-section of one of the die-moldsections, the ring for molding a plastic bristle-supporting block, and amolded block with bristles. Fig. 6 is a top plan view of theblock-molding ring detached. Fig. 7 is a vertical cross-sec tion of bothdie-mold sections inclosing a recessed wooden back-blank, having amolded 'oo mpressible bristle-block within the backrecess. n

The object of my invention is to secure a compressiblebristle-supporting block, molded from plastic `material, in an undercutrecess in the face of a partially formed backblank of wood, bycompression in suitable die-mold sections, and at the same time impartto the back-blank and block the desired form for a brush. Themold-sections maybe like those employed for making brushes in which thebristle-supporting block is molded integral with the back from plasticmaterial, and shown in United States patent issued to me forimprovements in brush-molds, .Iannary S, 189,5, No. 532,210.

In the manufacture. of my improved brush, I insert/the bristles in thebristle-apertures or recesses in one section A of the mold,forming thebristle-tufts B which project up above the molding surface that formsthe face of the bristle-block.' I then place the molding-ring B upon themold-section so as to inclose Within the ring the projecting bristlesand pour or pack around the bristles plastic material, which willafterward harden and support the bristles, until the space inclosed bythe ring is filled, thereby producinga molded bristle-supportingblock`When the plastic material has sufficiently`hardened, I remove themolding ring and substitute in its place the back-blank D having in itsface a recess D of a size and form to receive and approximately iitthebristle-block, as shown in Fig. 7. The peripheral edgesof the moldedblock are slightly beveled so that the block tapers outwardly fromits-supporting mold-section, the molding-ring being correspondinglybeveled so that it may be easily withdrawn from the molded block. Therecess Walls of the back blank are beveled in the opposite direction, orundercut, as shown at D?, whereby the block will be firmly secured tothe back, if the block is expanded edgewise to fill the undercut recess.To produce the desired expansion of the block edgewise, I then place theother section A of the Kmold upon the back of the blank and press thesections together in a hydraulic or other powerfuldpress. As themold-sections come together, the bristie-block and back-blank are bothcompressed and given form. The compression of the block makes it thinnerand expands yit edgewise so that it tightly lills the entire recess inthe finished back D?, as seen in Fig. 2. The blank is also made thinnerand made to correspond in shape to the die-surfaces of the mold-section'or sections, which engage it.

\ When desired, the die-surfaces may be provided with ornamental figureswhichl WillV form corresponding Ornamental figures upon the finishedback. l The back may have'any desired general shape, and a handle D5 ofany desired form. Ornamental figures D6 may be formed by the dies uponthe handle-part.

When desired, the plastic material forming the bristle-block may beallowed to harden by cooling before the parts are compressed,

and the exposed surfaces which are to be forced into contact with .theback softened by heating, thereby insuring the edgewise eX- pansionnecessary to fill the undercut space in the recess Without danger ofdisturbing the relative position of the bristle tufts located in thehard part of thevmaterial.

The undercut Walls of the recess maybe of any known form which Willclasp the' edges of the compressed block to prevent its escape.

What I claim as new, and desire to secure by Letters Patent, is--V 1. Ina brush, the combination with a back having an undercut recess in itsface, of a bristle-supporting block formed of plastic material expandededgewise in the recess by pressure, whereby it is secured to the back,substantially as described. y

2. That improvementin the method of making brushes, which consists incompressing a bristle-supporting block Within a recess in the face of acompressible back-blank, `and at the same time molding the blank into abrush-backby pressure upon inclosing moldsections, substantially asdescribed.

`3. Thatimprovement in the method of making brushes in a mold, whichconsists in molding a bristle-supporting block from plastic materialaround tufts of bristles in one section of the mold, then forcing themolded bristle-block into an undercut recess in the face ofacompressible back-blank, and at the same time molding the blank into abrushba'ck by pressure upon the inclosing moldsections substantially asdescribed.

4. The herein described method of making brushes which consists inmolding a bristlesupporting block from plastic material around tufts ofbristles in one section of the mold, allowing the molded material toharden by cooling, and softening the exposed surfaces of the moldedmaterial by heating, and then forcing the softened portion of thebristle-block into an undercut recess in the face of a brushback. y

In testimony whereof I have hereunto set my hand this 24th day ofDecember, 1894:.

WM. MORRISON. Witnesses:

FRANK C. CURTIS, HARRY H. ROUSSEAU.

